Rotary pump, compressor, motor, engine, and like machinery.



No. 814x674 P. J. ROOHOW.-

PATENTBO-MAY 1,; i906.

ROTARY PUMP, COMPRESSOR, MOTOR, ENGINE, AND LIKE MAOHINR.

` APPLICATION FILED OGT.12,'190 3.

No. 819,O74. PATBNTED MAY 1, 1906. P. J. ROOHOW. l ROTARY PUMP,COMPRESSOR, MOTOR, BNOINOAND LIKE MACHINERY.

APPLICATION FILED 0CT.12, 1903.

2 SHBETS*SHBET 2.

` STATES enfrnur ,or-leienA ssnnnnisn J. nocnoiv, or BROOKLYN, NEW Your.

no. eisers.

Specification of Letters Patent.

rammed my 1, 190e.

application fina cacher i2, 190s. vemu Mimes?.

To @it wiz/om it muy; conocen:

Be it known that l, .Fnsnnmsn JBocHo'W, .of Brooklyn, New York, haveinvented cer-- tain linpicveinfuits in Rotary Funips, Cornpressors,Motors, Engines, and Like Ma,- chinery, et 'which the 'followingdescription, in connection With the. accompanying dre??? ings, is spe"ic-ation, lilre numerals on. the dvin i desir.,A ting-like ports.

This invention rel -ites to pumps or Lilie devices pori..culn1lyapplicable to the compression or pumping air, dro., although lcontemplate the embodiment ot niy improveinents in motors, engines, andlike machinery Whatever the character in any iield Whe-re the i natureof luy improvements render them of value.

lily ii'lvention relates more specifically vto the type of .machineillustrated in the rotcry pump forming the subject of United StatesLetters Patent No. 33,961, granted to ine src , contempla upon the .17thday oi December, 1861, and which has Ylor niany years been a standardforni ol pump, simple and eflicient in operar tion at lonY pressures,but lacking elliclency at high pressures by reason of a certain amountor' leakage which is diiiicultto avoid in a singleindcr punip of thiskind. l the compounding of several units of this type ol' pump, and theaccomplishment oi this feature vforms the subject of the followingspeciiication, with drawings, ere the various features oi' inv inventionf' d i illustrated .fully and i ine e; nis.

in ,.itwings, Figure l is a view in plan ol a compound rpt/ary punip inthe construeg ...,i my improvements have been Fig. 2 View inlongitudinal .su Fig. 3 isa view in trsnsverse vertical section on thevertical longitudinal section of the shaft, and Fig. o a transversesection thereof.

ln the embodiment of my invention selected for description endillustration as a con venient form ro enable readyI and complete under-stending oi iny improvements the part de ated by the reference-numeral l,is a f using constructed substantially in ec- 1 ce with .my i. rs Patentto which reierence been made above and in Which operate p 3, ac ted b fa shaft 4.-, ein ni t to receivetlie bla es, a slot in t i .ierinittingpassage ot' the leg 7 of the piston 3. The construction of these pistonsand the shaft may he, varied, as found suitable and convenient, and as'one form of construction the blades may be divided into two parts, asindicatedv at 8 upon `the blade 2, one partv having a Arecess 9 (seeFig. 2) in which lies a spring `10 a similar provision being made at 11inthe piston 3 to hold the pistons out against the cylinders.

The fluid to be pumped may be introduced to the casing at 13, passinginto the chamber 14, in'which it is acted upon by the pstns in usuelmanner and carried around to the outlet 15, whence in accordance with myinvention a connection 16, preferably formed as channel 17 in thecasing, leeds to a sirnilfig connection 26 upon the adjacent casing 21',the channel 17 in this connection leading to the inlet-port 25 of thecylinder 21.

The shaft portion 24 may be in' continuation of' and integral with theshaft 4, and additional casing or pump units may be connected up, asthat illustrated at A31, with blades 32 33, similar to those alreadydescribed, and provided with connections 36 39, and the shaft muy bedriven from any suitable source of power. (Not shown.)

ln operation, connection having been made with a suitable source ofsupply of fluid, the latter be drawn in at the inlet 13 of the casing 1and underthe action of the pistons therein in the direction of the arrowwill be delivered to the casing 21 at a pressure of, say, twenty-livepounds to he acted upon by the pistons 22 23 in turn and delivered at anincreased total pressure of, say, fifty unds to the casing 31, Where thepressure will be still further increased.. In accordance with myinvention the ports and the connections between them are so arrangedthat the fluid will pass from one casing to another snd be acted uponwithin the casings with the least possible deflection from its naturalcourse, eliminating friction and resistance due `to counter currents-afeature of primary importance dynamically.

By. locating 'the orts in the periphery of thel casings I enab e a Widerrange of form and size of the ports, as Well as promoting the easy flowof the Huid above mentioned.

' The casings Wili preferably be formed separately for ease ofconstruction and open at one end, res ectively, to permit readyintroduction of t e movlng parts, and they may be provided, asillustrated, with flange-endbolt connections 40 41;. f

In assembling the parts when constructed as illustrated the partscomprising the iston-blades 2 and 3 for the cylinder 1 are rst placed inthe cross-slots 42 (see Fig. 5) of the shaft 4 between the partition 43and the shaft end 44, after which filling or distance pieces 45 areplaced in the slots 42, as best shown in Fig. 6, where one of the piecesis partly in place in the slot at the bottoni of the figure, two ofthese pieces being fully insorted in the side slots. Grooves 46 areformed in the periphery of the shaft and distance-pieces to receivepacking-rings 48, which will be put in place before introductior` oftheshaft to the casing, and when the x shaft', with blades 2 3, has beenthrust home until the distance-pieces lie in the circular aperturebetween the casing land the casing 21 the blades 22 23 may be (put inposition in` the slots 42, being separate from the blades 2 3 by thedistance-pleces 45, and similar distance-pieces 49 will be used vbeyondthe vblades 22 23 and the casing 21 slipped over them against the flangeof the casing 1 and there bolted in place. The casing 31 will be addedin similar fashion and succeeding casin s, if any, the last casingreferably having a hearing 51 for the end o the shaft, afriction metalbushing 52 being provided, if found necessary, and an oil-cup 53. Acylinder-head is shown at 5.4, held in place by bolts 55, and throughthe central a erture 56 in this head extends the shaft en which may betapered at 57 to coperate with taper 58 in the bore of a bushing' 59,screwed into the cylinder-head and adjustable therein to take up wear, asplit lockinut'GO being provided, preferably. At the outer end of thisbushing may be provided a stuHing-box gland 61, formed with a feather 62and having a retaining cap or nut 63. It is desirable that the ends ofthe piston-blades 32 33 at the opposite end of the shaft shall abutsnugly against i the outer end' of the casing 31 to prevent leakage, andthis may be accomplished conveniently-by a spring 64 between the cylin-A der-head 54 and the end of the enlarged medial portion of the shaft, aloose Washer 65 y being in tei' osed between the shaft end andcompressed in the still smaller casing 131.`

spring, if ound desirable, and preferably kept from rotating by asuitable device, as the feather 66, said spring ermitting also a slightplay between vthe sliaft and pistons upon expansion or contraction ofthe former within the latter.

Passing to the modification illustrated in Fig. 4, it Will be noticedthat the casings 101, 121, and y131, respectively, differ in size, sothat a fluid, such as air, introduced to the largest, 101, will besubject to compression when acted upon b y the piston devices in thesmaller casing 121 and will be still further This latter type ofcompressormay be operated as a'compound steam-engine by introthe casingthe casing the steam d'ucing steam at high pressure to 131 andexhausting from it into 121 and 101 in turn, which utilize atrespectively lower. pressures.

The operation of the device illustrated above will be` understoodclearly from the.

above description, and it will be obvious that anyleakage which wasobjectionable in `a single-casing machine of the above type is talrencare of in the compound casings, and' when my improvements are appliedto steamengines the leakage is utilized in the lowerpressure casing toperform work, ava-iling to the full of the natural efficiency of thistype of. rotary a paratus.

It is preferred to arrange the adjacent cas ings 'with theireccentricities at one hundred and eighty degrees to enable the portconnections from outlet to inlet to be made as short as possible; but itwill be understood that I do not limit myself to the exact constructionillustrated and described above nor in general otherwise than assetforth in the claims read in connection with .this specification.

What I claim, and desire to secure by ters Patent, is-

1. Rotary apparatus of the class described i of directly-abutting avingperipheral inlet uralit textended cent cylin4 eig; and rotatab eseparating vices intermediate 'said cylinders., substantially asdescribed'.

3. Rotary apparatus of the class described comprising a, luralitopen-ended cy inders aving'penpheral inlet and outlet ports and integralchannels ex and pro- IOO Orts, and peripheral chanl IIO tension of saidports, said cylinders beindiposed eccentrically with respect to a shatatable within said cylinders, adjacent cylin:

ders being arranged at angles of one hundred A and eighty degrees tobring the mouth ofthe channel from the inlet-port of 011e .Cylinderopposite the mouth of t e channel from the outlet-portici theneighboring cylinder; and rotatable separating devices lntermediate saidcylinders.

4. Rotary apparatus ofthe class described comprising a plurality ofcommunicating open-ended cylinders, 'a shaft rotatable in said cylindersrespectively and slotted for the reception of piston plates or devicesto oper- 'ate in each lcylinder and divisionmediate said plates androtatab -ing said s aft and ivision-pieces between said cylinders, toprevent leakage therebetween.

6. A shaft for compound rotary apparatus having a plurality ofcylinders, consisting of a cylindrical casting having a central axialbore divided by a plurality of transverse Webs into a series of axialchambers, and a plurality of` longitudinal slots intersecting thecentral 4chambers intermediate said webs to form transverse bearin-slots for piston devices, to operate in said cy inders. 4

7. A shaft for compound rotary apparatus having a plurality ofcylinders, consisting of a cylindrical castin having a plurality oftransverse Webs, an a lurality of `longitudinal slots intersectin t ecentral chambers intermediate said we s to formtransve'rse bearing-slotsfor piston devices, to operatein said cylinders, with division-pieces insaid slots to separate said piston devices and maintain the same inposition relatively to each other in their respective cylinders.

S. Rotary apparatus com rising a series of abutting cylinders, a rotatale shaft therein carrying piston-blades for each cylinder and means topermit expansion and contraction of said shaft without binding of saidpistons. 9. Rotary apparatus of the class described comprising aluralitygof c"\,\".inders\; a piston device for sai cylindersrespectively; a shaft recessed to receiveaai piston devices; and aspring acting upon one end of said series oi iston devices to maintainsaid piston device arthest therefrom in constant contact with theadjacent headof its cylinder, substantially as described.

10. Rotary apparatus of the class described, comprising a series ofcylinders having at each end bearings to receive a shaft, one

bearings being adjustable and having bore; a shaft in said bearings,having a peripheral taper to coperate with said tapered bearing; pistondevices capable of slight axial motion relative to said shaft; and aspring acting upon one end of said series of pistons to maintain thesame constantly in pro er position regardless of the position of saishaft, substantially as described.

11. Rotary apparatus of the class described comprising a series ofopen-ended cylinders having respectively an eccentric opening at one endacircular opening at the other end, said cylinders being formedseparately and arranged to be fitted together; and means to secure saidcylinders in assembled relation.

Signed yat New York, York and State of New October, A. D. 1903.

" FERDINAND J. ROCHOW.

Witnesses: y

ALEXANDER C. PRoUDFIr, HENRY B. PoGsoN.

of said a tapered in the county of New York, this 3d day of

